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A036731 as a simple table

n a(n)
0 1
1 1
2 1
3 9
4 65
5 477
6 3785
7 31533
8 270337
9 2371263
10 21193149
11 192284739
12 1766310505
13 16394986515
14 153535816653
15 1448874875343
16 13764044479777
17 131523942026598
18 1263329497333535
19 12190965137205164
20 118130808506571613
21 1148989417789699082

[1,1,1,9,65,477,3785,31533,270337,2371263,
 21193149,192284739,1766310505,16394986515,
 153535816653,1448874875343,13764044479777,
 131523942026598,1263329497333535,
 12190965137205164,118130808506571613,
 1148989417789699082]

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Last modified June 19 13:00 EDT 2021. Contains 345129 sequences. (Running on oeis4.)